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A014942
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( 1+24^n*(23*n-1) ) / 529.
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1
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1, 49, 1777, 57073, 1715953, 49491697, 1387212529, 38078983921, 1028756811505, 27446832213745, 724884022832881, 18985057740861169, 493749574409596657, 12764586312924606193, 328300388160453422833, 8406016915457191128817
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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FORMULA
| a(n) = a(n-1) + n * 24^(n-1).
a(n)= 49*a(n-1) - 624*a(n-2) + 576*a(n-3).
G.f.: x/( (1-x)*(1-24*x)^2 ). [Joerg Arndt, May 23 2010]
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MATHEMATICA
| a[1] = 1; a[n_Integer] := a[n - 1] + n*24^(n - 1); Table[ a[n], {n, 1, 20}]
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CROSSREFS
| Cf. A014960.
Sequence in context: A140394 A008843 A145848 * A065785 A163927 A061615
Adjacent sequences: A014939 A014940 A014941 * A014943 A014944 A014945
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KEYWORD
| nonn
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AUTHOR
| Olivier Gerard (olivier.gerard(AT)gmail.com)
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 15 2000
Exchanged Lava formula of Jan 2009 with the definition [R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 23 2010]
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