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A227073 Positive numbers without the digit 0 such that sum of cubes of the digits equals the square of the sum of the digits. 3
1, 12, 21, 22, 123, 132, 213, 231, 312, 321, 333, 1224, 1234, 1242, 1243, 1324, 1342, 1422, 1423, 1432, 2124, 2134, 2142, 2143, 2214, 2241, 2244, 2314, 2341, 2412, 2413, 2421, 2424, 2431, 2442, 3124, 3142, 3214, 3241, 3412, 3421, 4122, 4123, 4132, 4212, 4213 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

There are a total of 320880755 numbers in this sequence.

LINKS

T. D. Noe, Table of n, a(n) for n = 1..2987 (numbers less than 10^6)

MATHEMATICA

(* let tx[[i]] be numbers computed in A227072 *) Sort[Flatten[

  Table[FromDigits /@ Permutations[IntegerDigits[tx[[n]]]], {n, 14}]]]

CROSSREFS

Cf. A225567 (primes in a related sequence), A227072.

Sequence in context: A129939 A082799 A089320 * A116700 A132132 A248378

Adjacent sequences:  A227070 A227071 A227072 * A227074 A227075 A227076

KEYWORD

nonn,base,fini

AUTHOR

T. D. Noe, Jul 27 2013

STATUS

approved

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Last modified August 10 16:24 EDT 2022. Contains 356039 sequences. (Running on oeis4.)