login
A377276
Decimal expansion of the circumradius of a truncated tetrahedron with unit edge length.
2
1, 1, 7, 2, 6, 0, 3, 9, 3, 9, 9, 5, 5, 8, 5, 7, 3, 8, 8, 6, 4, 1, 4, 0, 7, 5, 2, 8, 3, 8, 6, 1, 1, 6, 5, 7, 0, 1, 4, 7, 0, 5, 7, 0, 8, 8, 3, 5, 2, 9, 3, 4, 2, 8, 8, 4, 0, 1, 4, 2, 5, 4, 7, 2, 7, 5, 4, 2, 5, 6, 1, 5, 8, 1, 8, 8, 3, 0, 9, 9, 3, 0, 3, 7, 0, 5, 2, 8, 8, 9
OFFSET
1,3
LINKS
Eric Weisstein's World of Mathematics, Truncated Tetrahedron.
FORMULA
Equals sqrt(22)/4 = A010478/4.
EXAMPLE
1.17260393995585738864140752838611657014705708835...
MATHEMATICA
First[RealDigits[Sqrt[22]/4, 10, 100]] (* or *)
First[RealDigits[PolyhedronData["TruncatedTetrahedron", "Circumradius"], 10, 100]]
CROSSREFS
Cf. A377274 (surface area), A377275 (volume), A093577 (midradius), A377277 (Dehn invariant).
Cf. A187110 (analogous for a regular tetrahedron).
Cf. A010478.
Sequence in context: A277848 A248285 A117029 * A128475 A377750 A309647
KEYWORD
nonn,cons,easy
AUTHOR
Paolo Xausa, Oct 23 2024
STATUS
approved