OFFSET
0,1
COMMENTS
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 0..7259, first 120 diagonals.
EXAMPLE
. n\k | 1 2 3 4 5 6 7 8 9 10 11 12 13
. ----+------------------------------------------------------------------
. 0 | 2 3 5 7 11 13 17 19 23 29 31 37 41 ..
. 1 | 2 5 10 17 28 41 58 77 100 129 160 197 238 ..
. 2 | 2 7 17 34 62 103 161 238 338 467 627 824 1062 ..
. 3 | 2 9 26 60 122 225 386 624 962 1429 2056 2880 3942 ..
. 4 | 2 11 37 97 219 444 830 1454 2416 3845 5901 8781 12723 ..
. 5 | 2 13 50 147 366 810 1640 3094 5510 9355 15256 24037 36760 ..
. 6 | 2 15 65 212 578 1388 3028 6122 11632 20987 36243 60280 97040 ..
. 7 | 2 17 82 294 872 2260 5288 11410 23042 44029 80272 140552 237592 ...
MATHEMATICA
nmax = 11;
row[0] = Prime[Range[nmax+1]];
row[n_] := row[n] = row[n-1] // Accumulate;
T[n_, k_] := row[n][[k]];
Table[T[n-k, k], {n, 0, nmax}, {k, 1, n}] // Flatten (* Jean-François Alcover, Oct 11 2021 *)
PROG
(Haskell)
a254858_tabl = diags [] $ iterate (scanl1 (+)) a000040_list where
diags uss (vs:vss) = (map head wss) : diags (map tail wss) vss
where wss = vs : uss
a254858_list = concat a254858_tabl
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Reinhard Zumkeller, Feb 08 2015
STATUS
approved