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A249989 Numbers representable as x^y * y + y, where x>1 and y>1 are integers. 1
10, 20, 27, 34, 52, 68, 74, 84, 100, 130, 164, 165, 195, 202, 244, 290, 328, 340, 378, 390, 394, 452, 514, 580, 650, 651, 724, 802, 884, 903, 970, 1028, 1032, 1060, 1154, 1220, 1252, 1354, 1460, 1539, 1570, 1684, 1802, 1924, 2050, 2056 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The sequence of numbers z such that both z and z+1 are in the sequence begins:

164, 650, 5187, 41474, 472394, 2654210, 10125002, 21233667, 30233090, 76236554, 169869314, 344373770, 648000002

LINKS

Table of n, a(n) for n=1..46.

EXAMPLE

a(1) = 10 = 2^2 * 2 + 2.

a(2) = 20 = 3^2 * 2 + 2.

a(3) = 27 = 2^3 * 3 + 3.

a(9) = 100 = 7^2 * 2 + 2.

a(11) = 164 = 9^2 * 2 + 2.

a(12) = 165 = 2^5 * 5 + 5.

CROSSREFS

Sequence in context: A101869 A015872 A019491 * A175229 A242964 A063117

Adjacent sequences:  A249986 A249987 A249988 * A249990 A249991 A249992

KEYWORD

nonn

AUTHOR

Alex Ratushnyak, Jan 11 2015

STATUS

approved

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Last modified December 1 09:26 EST 2021. Contains 349426 sequences. (Running on oeis4.)