login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A111624 Second lower diagonal of A109626. 1
1, 4, 5, 2, 7, 8, 3, 10, 11, 8, 13, 14, 5, 16, 17, 12, 19, 20, 14, 22, 23, 24, 25, 26, 9, 28, 29, 10, 31, 32, 33, 34, 35, 24, 37, 38, 26, 40, 41, 14, 43, 44, 15, 46, 47, 16, 49, 50, 51, 52, 53, 36, 55, 56, 38, 58, 59, 60, 61, 62, 63, 64, 65, 22, 67, 68, 46, 70, 71, 72, 73, 74, 75 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

LINKS

Table of n, a(n) for n=3..75.

MATHEMATICA

f[n_] := f[n] = Block[{a}, a[0] = 1; a[l_] := a[l] = Block[{k = 1, s = Sum[ a[i]*x^i, {i, 0, l - 1}]}, While[ IntegerQ[ Last[ CoefficientList[ Series[(s + k*x^l)^(1/n), {x, 0, l}], x]]] != True, k++ ]; k]; Table[a[j], {j, 0, 128}]]; g[n_, m_] := f[n][[m]]; Table[ g[n, n - 2], {n, 3, 75}]

CROSSREFS

Cf. A109626.

Sequence in context: A130144 A118472 A194880 * A019815 A281143 A200684

Adjacent sequences:  A111621 A111622 A111623 * A111625 A111626 A111627

KEYWORD

nonn

AUTHOR

Paul D. Hanna and Robert G. Wilson v, Aug 01 2005

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 28 11:08 EST 2020. Contains 332323 sequences. (Running on oeis4.)