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A045807 7-ish numbers (end in 53, 71, 79, 97). 1
53, 71, 79, 97, 153, 171, 179, 197, 253, 271, 279, 297, 353, 371, 379, 397, 453, 471, 479, 497, 553, 571, 579, 597, 653, 671, 679, 697, 753, 771, 779, 797, 853, 871, 879, 897, 953, 971, 979, 997, 1053, 1071, 1079, 1097, 1153, 1171, 1179, 1197, 1253, 1271 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..1000

FORMULA

Empirical G.f.: x*(53+18*x+8*x^2+18*x^3+3*x^4)/(1-x-x^4+x^5). [Colin Barker, Jan 23 2012]

PROG

(Haskell)

import Data.List (findIndices)

a045807 n = a045807_list !! (n-1)

a045807_list = findIndices (`elem` [53, 71, 79, 97]) $ cycle [0..99]

-- Reinhard Zumkeller, Jan 23 2012

CROSSREFS

Cf. A045800-A045809.

Cf. A045572, A045797, A045798.

Sequence in context: A223091 A301479 A244187 * A007644 A136073 A133187

Adjacent sequences:  A045804 A045805 A045806 * A045808 A045809 A045810

KEYWORD

nonn,base,easy

AUTHOR

J. H. Conway.

EXTENSIONS

More terms from Erich Friedman.

STATUS

approved

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Last modified April 18 06:48 EDT 2019. Contains 322209 sequences. (Running on oeis4.)