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 A262015 a(n) = [x^n] (1-x)^(4*n+1) * Sum_{k>=0} binomial(n+k-1,k)^4 * x^k. 1
 1, 11, 603, 49682, 4961755, 554083761, 66555527346, 8415759917268, 1105492743188955, 149552158117961225, 20710288432292240353, 2923132560874617706758, 419153950726771517250994, 60909593781491823719018822, 8952489587089165075007703060, 1328855554150146863702291235432, 198950469430034588049648664728027, 30012345078088728771497844274527081 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Main diagonal of triangle A262014. LINKS Table of n, a(n) for n=0..17. PROG (PARI) {A262014(n, k)=polcoeff(sum(j=0, n+k, binomial(n+j, j)^4*x^j)*(1-x)^(4*n+1), k)} for(n=0, 20, print1(A262014(n, n), ", ")) CROSSREFS Sequence in context: A079915 A185656 A142738 * A275572 A115737 A319835 Adjacent sequences: A262012 A262013 A262014 * A262016 A262017 A262018 KEYWORD nonn AUTHOR Paul D. Hanna, Sep 10 2015 STATUS approved

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Last modified April 23 23:26 EDT 2024. Contains 371917 sequences. (Running on oeis4.)