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 A202750 Triangle T(n,k) = binomial(n,k)^4 read by rows, 0<=k<=n. 4
 1, 1, 1, 1, 16, 1, 1, 81, 81, 1, 1, 256, 1296, 256, 1, 1, 625, 10000, 10000, 625, 1, 1, 1296, 50625, 160000, 50625, 1296, 1, 1, 2401, 194481, 1500625, 1500625, 194481, 2401, 1, 1, 4096, 614656, 9834496, 24010000, 9834496, 614656, 4096, 1, 1, 6561, 1679616 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 COMMENTS Zhi-Wei Sun has conjectures related to the arithmetic mean of the polynomials formed from the rows of this sequence. LINKS Vincenzo Librandi, Rows n = 1..21, flattened Zhi-Wei Sun, Conjectures and results on x^2 mod p^2 with 4p=x^2+dy^2 (2011). EXAMPLE Interpreted as polynomials: 1 x + 1 x^2 + 16*x + 1 x^3 + 81*x^2 + 81*x + 1 x^4 + 256*x^3 + 1296*x^2 + 256*x + 1 x^5 + 625*x^4 + 10000*x^3 + 10000*x^2 + 625*x + 1 PROG (PARI) for(n=0, 9, for(k=0, n, print1(binomial(n, k)^4", "))) CROSSREFS Cf. A007318. Sequence in context: A133824 A154228 A141697 * A177823 A142462 A203397 Adjacent sequences:  A202747 A202748 A202749 * A202751 A202752 A202753 KEYWORD nonn,easy,tabl AUTHOR Charles R Greathouse IV, Dec 23 2011 STATUS approved

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Last modified August 8 11:58 EDT 2022. Contains 356009 sequences. (Running on oeis4.)