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 A195839 Triangle read by rows which arises from A195829, in the same way as A175003 arises from A195310. Column k starts at row A118277(k). 10
 1, 1, 1, 1, 1, 1, 1, 2, 1, 3, 1, 4, 1, -1, 4, 1, -1, 4, 1, -1, 4, 2, -1, 5, 3, -1, 7, 4, -1, 10, 4, -2, 12, 4, -3, 13, 4, -4, 13, 5, -4, 14, 7, -4, -1, 16, 10, -4, -1, 21, 12, -5, -1, 27, 13, -7, -1, 32, 13, -10, -1, 34, 14, -12, -1, 36, 16, -13, -2, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,8 COMMENTS The sum of terms of row n is equal to the leftmost term of row n+1. This sequence is related to the generalized enneagonal numbers A118277, A195829 and A195849 in the same way as A175003 is related to the generalized pentagonal numbers A001318, A195310 and A000041. See comments in A195825. LINKS EXAMPLE Written as a triangle: .  1; .  1; .  1; .  1; .  1; .  1,  1; .  2,  1; .  3,  1; .  4,  1, -1; .  4,  1, -1; .  4,  1, -1; .  4,  2, -1; .  5,  3, -1; .  7,  4, -1; . 10,  4, -2; . 12,  4, -3; . 13,  4, -4; . 13,  5, -4; . 14,  7, -4, -1; . 16, 10, -4, -1; . 21, 12, -5, -1; CROSSREFS Row sums give A195849. Cf. A001082, A175003, A195828, A195836, A195837, A195838. Sequence in context: A195842 A195841 A195840 * A195838 A195837 A123539 Adjacent sequences:  A195836 A195837 A195838 * A195840 A195841 A195842 KEYWORD sign,tabf AUTHOR Omar E. Pol, Sep 24 2011 STATUS approved

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Last modified February 23 10:11 EST 2020. Contains 332160 sequences. (Running on oeis4.)