login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A106211 Row sums of triangle A106210. 1
1, 2, 7, 38, 301, 3224, 44021, 735216, 14580195, 335762290, 8824804889, 261084641178, 8597298494025, 312159531050382, 12399137504630097, 535147013379083822, 24950976908580696095, 1250331101054276584968 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..17.

PROG

(PARI) {a(n)=local(A=matrix(1, 1), B); A[1, 1]=1; for(m=2, n+2, B=matrix(m, m); for(i=1, m, for(j=1, i, if(j==i, B[i, j]=j, if(j==1, B[i, j]=(A^2)[i-1, 1], B[i, j]=(A^2)[i-1, j])); )); A=B); return(sum(k=0, n, if(k==0, A[n+1, k+1], A[n+1, k]/k^2)))}

CROSSREFS

Cf. A106210.

Sequence in context: A001858 A233335 A000366 * A222034 A014058 A119602

Adjacent sequences:  A106208 A106209 A106210 * A106212 A106213 A106214

KEYWORD

nonn

AUTHOR

Paul D. Hanna, May 01 2005

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 22 13:06 EDT 2018. Contains 316459 sequences. (Running on oeis4.)