A387899 Numbers that can be written in exactly three different ways in the form described by A387302.

313323, 550979, 2035918, 4094727, 4853691, 5122577, 5129782, 6057059, 6248742, 6785690, 6891027, 7586030, 8374709, 10176486, 10815379, 10947779, 11416777, 12674445, 12784227, 12935251, 13340344, 15343863, 15609693, 16654119, 16707648, 16868415, 16897550, 17395913, 17646230, 19549576, 19623267

Offset

1,1

Links

Table of n, a(n) for n=1..31.

Example

313323 = 2^11 + 4^5 + 5^6 + 6^7 + 7^2 + 11^4 = 2^13 + 3^8 + 4^3 + 5^2 + 6^5 + 8^6 + 13^4 = 2^14 + 3^4 + 4^8 + 5^7 + 6^2 + 7^6 + 8^5 + 14^3.
550979 = 2^16 + 3^11 + 4^8 + 5^6 + 6^2 + 8^3 + 11^5 + 16^4 = 2^7 + 3^12 + 4^5 + 5^6 + 6^3 + 7^4 + 12^2 = 2^9 + 3^10 + 5^8 + 8^2 + 9^3 + 10^5.
2035918 = 2^13 + 3^5 + 4^8 + 5^9 + 8^2 + 9^4 + 13^3 = 2^13 + 3^9 + 4^10 + 5^8 + 6^5 + 8^2 + 9^6 + 10^3 + 13^4 = 2^17 + 3^9 + 4^10 + 5^8 + 6^3 + 8^6 + 9^2 + 10^5 + 17^4.
4094727 = 2^11 + 3^8 + 4^6 + 5^9 + 6^3 + 7^5 + 8^7 + 9^2 + 11^4 = 2^13 + 3^8 + 4^6 + 5^9 + 6^2 + 7^5 + 8^7 + 9^4 + 13^3 = 2^14 + 3^6 + 4^10 + 5^8 + 6^2 + 7^4 + 8^7 + 10^3 + 14^5.

Crossrefs

Subsequence of A386967 and A387302.

Cf. A385969, A385232, A385233, A386966, A386967, A386968, A387099, A387100, A387898.

Sequence in context: A210296 A214244 A102499 * A234121 A250152 A104826

Adjacent sequences: A387896 A387897 A387898 * A387900 A387901 A387902

Keyword

nonn

Author

Alberto Zanoni, Sep 11 2025

Status

approved