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!)
A195850 Column 6 of array A195825. Also column 1 of triangle A195840. Also 1 together with the row sums of triangle A195840. 14
1, 1, 1, 1, 1, 1, 1, 2, 3, 4, 4, 4, 4, 4, 5, 7, 10, 12, 13, 13, 13, 14, 16, 21, 27, 32, 34, 35, 36, 38, 44, 54, 67, 77, 83, 86, 89, 95, 107, 128, 152, 173, 186, 194, 202, 216, 242, 281, 328, 368, 396, 415, 434, 464, 514, 588, 672, 748, 803, 844 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,8

COMMENTS

Note that this sequence contains three plateaus: [1, 1, 1, 1, 1, 1, 1], [4, 4, 4, 4, 4], [13, 13, 13]. For more information see A210843 and other sequences of this family. - Omar E. Pol, Jun 29 2012

LINKS

Table of n, a(n) for n=0..59.

FORMULA

G.f.: Product_{k>=1} 1/((1 - x^(8*k))*(1 - x^(8*k-1))*(1 - x^(8*k-7))). - Ilya Gutkovskiy, Aug 13 2017

a(n) ~ exp(Pi*sqrt(n)/2) / (4*sqrt(2-sqrt(2))*n). - Vaclav Kotesovec, Aug 14 2017

PROG

(GWbasic)' A program with two A-numbers:

10 Dim A074377(100), A057077(100), a(100): a(0)=1

20 For n = 1 to 60: For j = 1 to n

30 If A074377(j) <= n then a(n) = a(n) + A057077(j-1)*a(n - A074377(j))

40 Next j: Print a(n-1); : Next n

' Omar E. Pol, Jun 10 2012

CROSSREFS

Cf. A000041, A001082, A006950, A036820, A057077, A074377, A195825, A195830, A195848, A195849, A195851, A195852, A196933, A210964, A211971.

Sequence in context: A120510 A029117 A308547 * A253593 A174901 A308411

Adjacent sequences:  A195847 A195848 A195849 * A195851 A195852 A195853

KEYWORD

nonn

AUTHOR

Omar E. Pol, Oct 07 2011

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 April 8 08:54 EDT 2020. Contains 333313 sequences. (Running on oeis4.)