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!)
 A159925 Row sums of triangle A159924. 3
 1, 3, 12, 61, 370, 2606, 20925, 188772, 1890773, 20822481, 250082522, 3253176309, 45567394330, 683783923476, 10944068960451, 186098265906832, 3350501663825617, 63671208559149815, 1273621946395366224 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The sum of all terms in rows 1 through m of triangle A159924 is A159926(m). A159926(m) - A159926(m-1) = A159925(m), for m >= 2. LINKS Michael De Vlieger, Table of n, a(n) for n = 1..449 MAPLE A159924 := proc(n, m) option remember ; local s; if n = m then 1; else s := add(add(procname(r, c), c=1..r), r=1..n-1) ; procname(n-1, m)+s ; fi; end: A159925 := proc(n) local m; add( A159924(n, m), m=1..n) ; end: seq(A159925(n), n=1..40) ; # R. J. Mathar, Apr 29 2009 MATHEMATICA Total /@ Block[{m = 0}, NestList[Block[{w = #}, AddTo[m, Total@ w]; Append[m + w, 1]] &, {1}, 18]] (* Michael De Vlieger, Oct 30 2017 *) CROSSREFS Cf. A159924, A159926. Sequence in context: A192479 A161799 A182970 * A331607 A235802 A317169 Adjacent sequences:  A159922 A159923 A159924 * A159926 A159927 A159928 KEYWORD nonn AUTHOR Leroy Quet, Apr 26 2009 EXTENSIONS More terms from R. J. Mathar, Apr 29 2009 STATUS approved

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 December 5 06:51 EST 2020. Contains 338944 sequences. (Running on oeis4.)