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A076950 Smallest k such that nk-1 is a cube. 0
1, 1, 3, 7, 13, 21, 4, 43, 1, 73, 91, 111, 5, 2, 183211, 241, 7, 27, 343, 6, 421, 463, 507, 553, 189, 19, 1, 757, 813, 7, 931, 993, 1057, 196, 37, 36, 518, 126, 1483, 1561, 3, 8, 1807, 61, 1981, 2071, 2163, 140, 2353, 2451, 234, 2653, 91, 2863, 532, 9, 3193, 3307 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..58.

MATHEMATICA

Do[k = 1; While[ !IntegerQ[(n*k - 1)^(1/3)], k++ ]; Print[k], {n, 1, 59}]

CROSSREFS

Sequence in context: A033551 A022777 A033154 * A169633 A069194 A100531

Adjacent sequences:  A076947 A076948 A076949 * A076951 A076952 A076953

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Oct 20 2002

EXTENSIONS

Edited and extended by Robert G. Wilson v, Oct 21 2002

STATUS

approved

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Last modified August 4 15:50 EDT 2020. Contains 336202 sequences. (Running on oeis4.)