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 A143320 Triangle read by rows, A000012 * A143317; 1<=k<=n. 1
 1, 4, -1, 8, -1, -1, 15, -4, -1, 0, 21, -4, -1, 0, -1, 33, -8, -4, 0, -1, 1, 41, -8, -4, 0, -1, 1, -1, 56, -15, -4, 0, -1, 1, -1, 0, 69, -15, -8, 0, -1, 1, -1, 0, 0, 87, -21, -8, 0, -4, 1, -1, 0, 0, 1, 99, -21, -8, 0, -4, 1, -1, 0, 0, 1, -1, 127, -33, -15, 0, -4, 4, -1, 0, 0, 1, -1, 0 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Left border = A024916: (1, 4, 8, 15, 21, 33,...). Right border = mu(n), A008683. Row sums = T(n), triangular numbers. LINKS FORMULA Triangle read by rows, A000012 * A143317; 1<=k<=n EXAMPLE First few rows of the triangle = 1; 4, -1; 8, -1, -1 15, -4, -1, 0; 21, -4, -1, 0, -1; 33, -8, -4, 0, -1, 1; 41, -3, -4, 0, -1, 1, -1; ... CROSSREFS Cf. A143317, A008683, A024916. Sequence in context: A262361 A294791 A084884 * A089146 A297402 A239666 Adjacent sequences:  A143317 A143318 A143319 * A143321 A143322 A143323 KEYWORD sign,tabl AUTHOR Gary W. Adamson, Aug 07 2008 EXTENSIONS Corrected last few terms. - Stuart Orford (sjorford(AT)gmail.com), Dec 22 2008 STATUS approved

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Last modified October 15 22:21 EDT 2018. Contains 316252 sequences. (Running on oeis4.)