The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A336725 A(n,k) is the n-th number that is a sum of k positive k-th powers; square array A(n,k), n>=1, k>=1, read by antidiagonals. 10
 1, 2, 2, 3, 5, 3, 4, 10, 8, 4, 5, 19, 17, 10, 5, 6, 36, 34, 24, 13, 6, 7, 69, 67, 49, 29, 17, 7, 8, 134, 132, 98, 64, 36, 18, 8, 9, 263, 261, 195, 129, 84, 43, 20, 9, 10, 520, 518, 388, 258, 160, 99, 55, 25, 10, 11, 1033, 1031, 773, 515, 321, 247, 114, 62, 26, 11, 12, 2058, 2056, 1542, 1028, 642, 384, 278, 129, 66, 29, 12 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Alois P. Heinz, Antidiagonals n = 1..141, flattened EXAMPLE Square array A(n,k) begins:    1,  2,  3,   4,   5,   6,    7,    8,    9,   10, ...    2,  5, 10,  19,  36,  69,  134,  263,  520, 1033, ...    3,  8, 17,  34,  67, 132,  261,  518, 1031, 2056, ...    4, 10, 24,  49,  98, 195,  388,  773, 1542, 3079, ...    5, 13, 29,  64, 129, 258,  515, 1028, 2053, 4102, ...    6, 17, 36,  84, 160, 321,  642, 1283, 2564, 5125, ...    7, 18, 43,  99, 247, 384,  769, 1538, 3075, 6148, ...    8, 20, 55, 114, 278, 734,  896, 1793, 3586, 7171, ...    9, 25, 62, 129, 309, 797, 2193, 2048, 4097, 8194, ...   10, 26, 66, 164, 340, 860, 2320, 6568, 4608, 9217, ... MAPLE A:= proc() local l, w, A; l, w, A:= proc() [] end, proc() [] end,       proc(n, k) option remember; local b; b:=         proc(x, y) option remember; `if`(x=0, {0}, `if`(y<1, {},           {b(x, y-1)[], map(t-> t+l(k)[y], b(x-1, y))[]}))         end;         while nops(w(k)) < n do forget(b);           l(k):= [l(k)[], (nops(l(k))+1)^k];           w(k):= sort([select(h-> h

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified November 30 02:42 EST 2020. Contains 338781 sequences. (Running on oeis4.)