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A168140 Sum of n-th numerator and n-th denominator in triangle formed from Bernoulli numbers. 2
2, 3, 3, 7, 4, 7, 1, 7, 7, 1, 29, 31, 17, 31, 29, 1, 29, 16, 16, 29, 1, 43, 41, 104, 113, 104, 41, 43, 1, 43, 20, 109, 109, 20, 43, 1, 29, 31, 104, 101, 113, 101, 104, 31, 29, 1, 29, 16, 97, 109, 109, 97, 16, 29, 1, 71, 61, 172, 169, 1039, 263, 1039, 169, 172, 61, 71, 1, 71, 28, 197, 137, 247, 247, 137, 197, 28, 71, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Terms become negative later in the sequence. - R. J. Mathar, Apr 14 2010

LINKS

Alois P. Heinz, Rows n = 0..140, flattened

FORMULA

a(n) = A085737(n) + A085738(n).

MAPLE

b := proc(n, k) option remember; if k = 0 then (-1)^n*bernoulli(n) ; elif k > n/2 then procname(n, n-k) ; else procname(n-1, k-1)-procname(n, k-1) ; end if; end proc: T := proc(n, k) numer(b(n, k))+denom(b(n, k)) ; end proc: seq(seq(T(n, k), k=0..n), n=0..10); # R. J. Mathar, Apr 14 2010

CROSSREFS

Cf. A085737, A085738, A162298, A162299.

Sequence in context: A056225 A105437 A323952 * A088100 A097359 A208525

Adjacent sequences:  A168137 A168138 A168139 * A168141 A168142 A168143

KEYWORD

sign,tabl

AUTHOR

Juri-Stepan Gerasimov, Nov 19 2009

EXTENSIONS

A 109 duplicated, 1049 replaced with 1039 by R. J. Mathar, Apr 14 2010

STATUS

approved

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Last modified December 15 04:23 EST 2019. Contains 329991 sequences. (Running on oeis4.)