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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A132374 Expansion of c(7x^2)/(1-xc(7x^2)), where c(x) is the g.f. of A000108 . 9
 1, 1, 8, 15, 120, 274, 2192, 5531, 44248, 118686, 949488, 2654646, 21237168, 61189668, 489517344, 1443039123, 11544312984, 34648845862, 277190766896, 844131474530, 6753051796240, 20813234394492, 166505875155936, 518373091849502 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS Hankel transform is 7^C(n+1,2) . Series reversion of x(1+x)(1+2x+8x^2) . LINKS FORMULA a(n) = Sum_{k, 0<=k<=n}A120730(n,k)*7^(n-k). CROSSREFS Cf. A000012, A001405, A126087, A128386, A121724, A128387, A121725. Sequence in context: A189003 A110294 A110459 * A346314 A234534 A067686 Adjacent sequences:  A132371 A132372 A132373 * A132375 A132376 A132377 KEYWORD easy,nonn AUTHOR Philippe Deléham, Nov 10 2007 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 August 3 08:21 EDT 2021. Contains 346435 sequences. (Running on oeis4.)