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 A307651 a(n) is the determinant of the Vandermonde matrix of the digits of n. 2
 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, -7, -6, -5, -4, -3, -2, -1, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,14 LINKS Rémy Sigrist, Table of n, a(n) for n = 0..10000 Wikipedia, Vandermonde matrix FORMULA a(n) != 0 iff n belongs to A010784. a(n) = 0 for any n > 9876543210. EXAMPLE | 2^0 2^1 2^2 | a(234) = det | 3^0 3^1 3^2 | = 2.              | 4^0 4^1 4^2 | PROG (PARI) a(n) = my (d=digits(n)); matdet(matrix(#d, #d, r, c, d[r]^(c-1))) CROSSREFS See A307710 for the factorial base variant. Cf. A007376, A010784, A177894, A307586, A307587. Sequence in context: A319657 A255594 A030108 * A297330 A037904 A070615 Adjacent sequences:  A307648 A307649 A307650 * A307652 A307653 A307654 KEYWORD sign,base AUTHOR Rémy Sigrist, Apr 20 2019 STATUS approved

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Last modified November 28 01:24 EST 2021. Contains 349396 sequences. (Running on oeis4.)